hi guys im having trouble figuring this out.

Find the equation of the tangent to the curve

when

thank u!

Printable View

- Jun 17th 2008, 07:09 AMjvignacioequation of the tangent to the curve
hi guys im having trouble figuring this out.

Find the equation of the tangent to the curve

when

thank u! - Jun 17th 2008, 07:20 AMflyingsquirrel
- Jun 17th 2008, 07:32 AMjvignacio
yes we did that but what we are confused about is if we use x = -1 for both points?

because we will input -1 into the original formula, then the first point will be (-1, y(original))

then we get the derivative of the original equation then input x into that equation which will give us (-1,y(derivative of original)) ??????

but then if we find m, the denominator will be equal to ZERO which will give us an undefined function.

?? - Jun 17th 2008, 07:38 AMSuumEorum
You find the equation of the tangent by using where and are coordinates for a point on the tangent, in your case, . m is found by substituting -1 into , which you get by using the quotient rule.

- Jun 17th 2008, 07:51 AMjvignacio
Yesss i got it! thank u ;)